Door-knob.



R. GRIESER.

I DOOR KNOB. AIPLIGATION FILED MAY 29,1913.

1,090,616, Patented Mar17,1914.

Wu/"mo I I 5 woe wto c COLUMBIA PLANOGRAPH CO-.WASHINOTON. D c.

UNTTED snares Parana orrrcn RICHARD G-RIESER, OF NEW YORK, N. Y.

DOOR-KNOB.

readers.

To all whom it may concern c it known that l, RICHARD Gnrnsnn, a citizenof the United States, residing at the city of New York, borough ofBrooklyn, and State of New fork, have invented certain new and usefulImprovements in Door- Knobs, of which the following is a full, clear,and exact description.

This invention relates to door-knobs or handles and more particularly tothe type consisting of a two-part filled metallic shell.

The principal object of my invention is to provide a knob of thischaracter in which the danger of the shell collapsing or the partsbecoming loose will be eliminated.

With this 'and other objects in view, my invention consists of a knobhaving an improved form of support between the port-ions of the filler,which support maintains the portions of the filler in firm engagementwith the walls of the shell and in fixed relation to each other.

In the drawings, Figure l is a central longitudinal section of myimproved knob; Fig. 2 is a detail view of the support; and Fig. 3 is afront elevation of a modified form of knob.

The door-knob comprises a two-part shell consisting of sections 1 and 2,the section "1 being provided with a hub portion 3 shaped similarly to atruncated cone and converging toward its outer end. A substantiallysemispherical shell 4 is attached to the inner end of the hub 3 and ispreferably formed integral therewith by shaping the section out of asingle piece of metal. The shell 4 has a raised annular flange or head 5formed on its periphery. A cap-like semi-spherical shell 6 has acorresponding raised flange or bead 7 which fits over the bead 5 forminga tight joint which will firmly secure the shell-like parts of the knobtogether. The sections 1 and 2 are individually partially filled with asuitable filler designated 8 and 9, respectively, which filler may beany plastic composition which will harden upon drying or cooling. Thesurface of the filler in each of the sections of the shell issubstantially on a line with the line of jointure of the bead and theperipheral surface of each section of the shell, so that a sufiicientspace is left around the joint to permit the beads to properlyinterlock.

The knob thus far described hasbeen used and has the distinct advantagewhere ornamented knobs are desired, that the joint oc- Specification ofLetters Patent. Application filed May 29, 1913.

Patented Mar. 17, 1914. Serial No. 770,584.

curs in the plane of the maximum diameter of the spherical or globularshaped shell which permits each part to be formed and embossed with anysuitable design by the use of the ordinary form of stamping die. as isshown, for instance, in Fig. 3. I

Attempts have been made to manufacture door-knobs of this type, butheretofore it has been unsuccessful, due to the difficulty of properlyfilling the sl leave a space in the zone of the joint to If this spaceis not afterward filled, it is apparent that the jar occasioned by t eslamming of the door or the striking of the knob with a heavy object,will loosen the filler, and if the blow is sufficiently heavy, willcollapse the shell and the joint will become loose. It has been foundnecessary to rigidly support the portions of the filler with respect toeach other to make this form of knob practicable, and sand has beenintroduced between the parts but this is impracticable owing to thedifficulty of gaging the proper amount in the shell, which necessitates,in frequent instances, the takmg apart of the knob after it has beenasled, either to remove or to add more sand.

The important feature of my invention is to provide a support whichmaintains the sections of the filler properly spaced apart and which isreadily positioned.

Referring now to Fig. 2, wherein is shown my nnproved form of supportwhich conslsts of a circular metal disk or washer 11 provided with asquare hole 12 at its center. Th s disk or washer is divided into aplurality of sectors by radial slits running approximately half thelength of the radius of site direction, the remaining sectors 15remaining in their original position. This washer or disk is positionedin the space surrounding the joint on the surface of one of the sectionsof the filler, the outer edges of the unbent sectors engaging the wallsof the shell 4. The sectors 13 are firmly embedded in the filler 8 whichwill firmly anchor the-disk in place. The other set of sectors 14bridges the intervening space between the sections 8 and 9 of the fillerand are firmly embedded in the and preferably lies fiat filler 9, whichwill firmly hold the sections an important consideration inmanufacturing a large output'of articles of this type.

The knob is provided with a square sleeve 16 into which the knob-spindle(not shown) is adapted to fit. This sleeve passes through the squarehole 12 in the support 11 and is supported at its outer end by a disk orwasher 17 which has a force fit with the converging walls of the hub 3and is provided with a square hole through which the sleeve 16 passes,which is thus centrally positioned with respect to the knob. A cap 18fits into the end of the bore of the sleeve 16 and is held in place by aprotuberance 19 formed by indenting the Wall of the sleeve.

The method of assembling is obvious. The sleeve is positioned in the hubmember 2 and the section filled with a suitable plastic composition orfiller 8 and the section 6 of the shell with a filler 9. The support 11is then positioned on the surface of the filler 8 while the compositionis still soft, the sectors 13 being forced into the filler and becomingfirmly embedded therein. The two parts of the shell are assembled beforethe composition hardens, the sectors 14; forc- Copiez of this patent maybe obtained for five cents each, by addressing the ing their way intoand becoming firmly embedded in the filler 8, and the cap 18 preventingany of the material from entering the bore of the sleeve. 1

Having thus described my invention, 1 claim 1. A door-knob comprising ajointed two part shell each part containing an independent solid fillerand an independent rigid spacer interposed between the fillers andanchored to both of them. V

2. A door-knob comprising a two-part shell having a joint, a two-partfiller in said shell, the parts of said filler being separated at thezone of the joint, and a single support between the parts of the fillerhaving portions embedded in the respective parts thereof.

3. A door-knob comprising a two-part shell having a joint, a two-partparts of said filler being separated at the zone of the joint, a sleevein said knob, a support between the parts of the fillerhaving an openingtherein through which said sleeve passes for centrally positioning saidsleeve in said knob, said support having sector-like portions embeddedin the respective parts of said filler. i

In witness whereof I subscribe my sig nature, in'the presence of twowitnesses.

- RICHARD GRIESER. Vitnesses:

VALDO M. GHAPIN, J ULE ZELENKO.

Commissioner of Patents,

Washington, I). 0.

filler, the

